9
Structure and function
Exhaust port for CFA, CFB
Pilot air port for CFI
Pilot air port for CFA, CFB, CFI
Actuator/body interface
with wrench flat
Port connection
Relief bore
2
1
Image2:Type 2101globevalve,structureanddescription(2)
6.2
Function
Depending on the variant, the valve seat is closed in the direction
of or against the medium flow.
Spring force (CFA) or pneumatic pilot pressure (CFB and CFI)
generate the closing force on the swivel plate. A spindle con
-
nected to the actuator piston transmits the force.
6.2.1
Control functions (CF)
WARNING!
For control function I – risk of pilot pressure failure!
With control function I, the control unit and reset are pneumatic.
No defined position is reached during a pressure failure.
▶
To ensure a controlled restart of the device, first apply pilot
pressure and then activate the medium.
Control function A (CFA)
Closed by spring force in rest position
1(P)
2(A)
Control function B (CFB)
Opened by spring force in rest position
1(P)
2(B)
Control function I (CFI)
Actuating function via reciprocal
pressurisation.
1(P)
2(A)
Type 2101
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